Action in the North Atlantic is a 1943 American war film from Warner Bros. Pictures. It was produced by Jerry Wald, directed by Lloyd Bacon, and adapted by John Howard Lawson from a story by Guy Gilpatric. The film stars Humphrey Bogart and Raymond Massey as officers in the U.S. Merchant Marine during World War II.

Like other Hollywood war films made in the initial years of U.S. involvement in WWII, Action in the North Atlantic was regarded as a means of stirring patriotism and mobilizing the home front. The film tells the story of the unsung heroes in the Merchant Marine who brave attacks by German bomber planes and U-boats to deliver vital supplies to the Allies. The New York Times movie reviewer Bosley Crowther wrote, "it's a good thing to have a picture which waves the flag for the merchant marine. Those boys are going through hell-and-high-water, as 'Action in the North Atlantic' shows."